PROBLEM TO BE SOLVED: To enhance sensitivity in a magnetic measuring device with an optical pumping method.SOLUTION: A magnetic measuring device includes: a cell accommodating a medium that changes an orientation of a polarization plane of light according to magnetic field intensity therein a light source for emitting light that interacts with the medium to the cell a mirror for reflecting light having been transmitted through the cell toward the cell a polarization separator for separating light into a plurality of polarization components including a first polarization component and a second polarization component a first photodetector for detecting the first polarization component of light having been reflected by the mirror and having been transmitted through the cell and a second photodetector for detecting the second polarization component of the light having been reflected by the mirror and having been transmitted through the cell.COPYRIGHT: (C)2015,JPO&INPIT【課題】光ポンピング方式の磁気測定装置において、感度を向上させること。【解決手段】磁気測定装置は、磁場強度に応じて光の偏光面方位を変化させる媒体を内部に収容したセルと、その媒体と相互作用する光を、セルに出射する光源と、セルを透過した光を、セルに向けて反射するミラーと、光を、第1偏光成分および第2偏光成分を含む複数の偏光成分に分離する偏光分離器と、ミラーで反射されセルを透過した光の第1偏光成分を検出する第1光検出器と、ミラーで反射されセルを透過した光の第2偏光成分を検出する第2光検出器とを有する。【選択図】図1
